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@ryanc there are much worse cursed units. Look at physics, I mean the barn unit of area makes sense (1 barn = 10^-28 m^2).

But then we get the Jansky, which measures spectral flux density and is 10^-26 W m^-2 Hz^-1, but is commonly referred to in 10^-23 ergs s^-1 cm^-2 Hz^-1, because when you're measuring distance in parsecs, then cms matter.